virtio: remove virtio_alloc_virtqueues' flags arg

Summary:
the flags argument is unused.
Its initial design idea has been superceded by the addition of
virtio_setup_intr and related APIs.

Sponsored

virtio: remove virtio_alloc_virtqueues' flags arg

Summary:
the flags argument is unused.
Its initial design idea has been superceded by the addition of
virtio_setup_intr and related APIs.

Sponsored by: The FreeBSD Foundation

Reviewers: bryanv

Reviewed By: bryanv

Subscribers: cognet, imp

Differential Revision: https://reviews.freebsd.org/D41850

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virtio: use bool for boolean functions

Summary:
these static functions:
- vq_ring_use_indirect

and these public functions:
- virtio_bus_is_modern
- virtio_with_feature
- virtqueue_empty
- virtqueue

virtio: use bool for boolean functions

Summary:
these static functions:
- vq_ring_use_indirect

and these public functions:
- virtio_bus_is_modern
- virtio_with_feature
- virtqueue_empty
- virtqueue_full

exclusively return a boolean value.
Change their return values to bool.

Sponsored by: The FreeBSD Foundation

Reviewers: bryanv

Reviewed By: bryanv

Subscribers: cognet, imp

Differential Revision: https://reviews.freebsd.org/D41848

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sys: Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

virtio: make the write_config buffer argument const

No functional change intended, but noticed that we could add const here
while adding linuxkpi support for virtio.

Reviewed By: bryanv, imp
Differ

virtio: make the write_config buffer argument const

No functional change intended, but noticed that we could add const here
while adding linuxkpi support for virtio.

Reviewed By: bryanv, imp
Differential Revision: https://reviews.freebsd.org/D32370

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virtio: Add VirtIO PCI modern (V1) support

Use the existing legacy PCI driver as the basis for shared code
between the legacy and modern PCI drivers. The existing virtio_pci
kernel module will conta

virtio: Add VirtIO PCI modern (V1) support

Use the existing legacy PCI driver as the basis for shared code
between the legacy and modern PCI drivers. The existing virtio_pci
kernel module will contain both the legacy and modern drivers.

Changes to the virtqueue and each device driver (network, block, etc)
for V1 support come in later commits.

Update the MMIO driver to reflect the VirtIO bus method changes, but
the modern compliance can be improved on later.

Note that the modern PCI driver requires bus_map_resource() to be
implemented, which is not the case on all archs.

The hw.virtio.pci.transitional tunable default value is zero so
transitional devices will continue to be driven via the legacy
driver.

Reviewed by: grehan (mentor)
Differential Revision: https://reviews.freebsd.org/D27856

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Add VirtIO bus config_generation method

VirtIO buses (PCI, MMIO) can provide a generation field so a driver
can ensure either a 64-bit or array read was stable.

MFC after: 2 weeks

Merge sync of head

Reintegrate head: r274132-r277384

Sponsored by: The FreeBSD Foundation

Reintegrate head revisions r273096-r277147

Sponsored by: The FreeBSD Foundation

MFhead @ r275911 (also, sort out MK_* flags in BMAKE, etc on this branch)

Merge ^/head r275715 through r275748.

Add virtio bus 'poll' method allowing us to inform backend we are
going to poll virtqueue.

Use on BERI soft-core to invalidate cpu caches.

Reviewed by: bryanv
Sponsored by: DARPA, AFRL

Merge head r233826 through r256722.

Merge from head

IFC @ r254014

IFC @253398

IFC @ r252763

Merge virtio changes from projects/virtio

Contains projects/virtio commits:

r245738:
virtio: Minor man page tweaks
r246060:
virtio: Cleanup feature description printing
r246306:
virtio:

Merge virtio changes from projects/virtio

Contains projects/virtio commits:

r245738:
virtio: Minor man page tweaks
r246060:
virtio: Cleanup feature description printing
r246306:
virtio: Remove old debugging flag
r247238:
virtio: Remove PRIx64 macros from format strings
r247239:
virtio: Constify some fields
r247240:
virtio: Minor code simplifications
r249962:
virtio: Update to my freebsd.org email address

MFC after: 1 month

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IFC @230489 (pending review).

IFC @ r227804

Pull in the virtio drivers from head.

Import virtio base, PCI front-end, and net/block/balloon drivers.
Tested on Qemu/KVM, VirtualBox, and BHyVe.

Currently built as modules-only on i386/amd64. Man pages not yet hooked
up, pending revie

Import virtio base, PCI front-end, and net/block/balloon drivers.
Tested on Qemu/KVM, VirtualBox, and BHyVe.

Currently built as modules-only on i386/amd64. Man pages not yet hooked
up, pending review.

Submitted by: Bryan Venteicher bryanv at daemoninthecloset dot org
Reviewed by: bz
MFC after: 4 weeks or so

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